Performance analysis of an alternative link-16/JTIDS waveform transmitted over a channel with pulse-noise
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Authors
Wei, Ho Kah
Subjects
Advisors
Robertson, R. Clark
Date of Issue
2008-12
Date
Publisher
Monterey California. Naval Postgraduate School
Language
Abstract
The Joint Tactical Information Distribution System (JTIDS) is a hybrid frequency-hopped, direct sequence spread spectrum system that utilizes a (31, 15) Reed-Solomon (RS) code and cyclical code-shift keying modulation for the data packets, where each encoded symbol consists of five bits. The primary drawback to JTIDS is the limited data rate. In this thesis, an alternative waveform consistent with the existing JTIDS waveform but with twice the data rate is analyzed. The system to be considered also uses (31, 15) RS encoding, but each pair of five-bit symbols at the output of the RS encoder undergoes serial-to-parallel conversion to two five-bit symbols, which are then independently transmitted on the in-phase and quadrature component of the carrier using 32-ary orthogonal signals with a diversity of two. In this thesis, only coherent detection is considered. The performance obtained with the alternative JTIDS waveform is compared with the existing JTIDS waveform when only additive white Gaussian noise (AWGN) is present as well as when pulse-noise interference (PNI) is also present. Errors-and-erasures decoding (EED), errors-only decoding and perfect side information (PSI) are also considered.
Type
Thesis
Description
Series/Report No
Department
Organization
Naval Postgraduate School (U.S.)
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NPS Report Number
Sponsors
Funder
Format
xvi, 48 p. ;
Citation
Distribution Statement
Approved for public release; distribution is unlimited.